Remove sausage from the stockpot, leaving the grease. Add canola oil and flour to the pot to create a roux. Cook flour and oil for approximately 20 minutes, stirring frequently until it turns chocolate brown.

Chocolate Brown ROux

Add vegetables and cook until softened, stirring periodically.

Sautee Holy Trinity (onions, celery, and bell pepper)

Add the turkey, sausage, and chicken broth. Allow the gumbo to simmer for 30-45 minutes. Stir in file powder to thicken the gumbo.